If you have ever had to do any programming with time, you know the crazy knots that it can tie you into. First, there are time zones, where a given instant is not at the same hour for two different points on Earth. Then you find daylight saving time, the hour that doesn't exist (or else exists twice), twice a year. You have to account for leap years and leap seconds, to keep human clocks in sync with the Earth's revolutions around the Sun. You have to program around the Y2K and Y2038 bugs. The list goes on and on.
{% alert %} Note: If you want to keep going down this manic rabbit hole, I highly recommend [The Problem with Time & Timezones](https://www.youtube.com/watch?v=-5wpm